I am not sure direct burial really changes things much. The normal tables compute at 75c but when I run my calculator at 30c it only changes the drop 2 volts.
450' of 3/0 cu @ 200a is 13.788v (75c)
It comes out to 11.784 at 30c.
In real life you won't have 200a, I bet a cruising current of less than 100 is more realistic. It all depends on what you want to design for and what the PoCo is giving you in the first place. My power is around 124 at the meter so I can afford a little drop.
Does Mac support good old "basic" language?
I have a program written by an IBM engineer that I use. It runs on anything that uses basic, including ROM basic on the first PC.
W/9x runs it fine in the dos box
Email me at gfretwell@aol.com I will send it to you.
